<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <script type="application/javascript"> window.onload = function () { var firstNubmer = document.getElementById('first'); var secondNumber = document.getElementById('second'); var btn = document.getElementById('btn'); var result = document.getElementById('result'); var remove = document.getElementById('remove'); btn.onclick = function () { var firn = parseInt(firstNubmer.value); var secn = parseInt(secondNumber.value); var sum = firn + secn; result.value = sum; } remove.onclick = function () { firstNubmer.value = ''; secondNumber.value = ''; result.value = ''; } } </script> </head> <body> <input type="text" id="first" > + <input type="text" id="second"> = <input type="text" id="result"> <input type="button" id="btn" value="计算"> <input type="button" id="remove" value="清除结果"> </body> </html>
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转载自www.cnblogs.com/lurj/p/12463128.html
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